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Q=why are we use reducers and why

Q=why are we use reducers and why

(OP)

Q=why are we use reducers and why we use concentric and why we use eccentric reduer???

RE: Q=why are we use reducers and why

Q1: Why we use reducers?
A1: It depends on margin between NPSHA and NPSHR. In some cases low NPSHR and overall suction system layout can allow to use suction line the same size as pump suction nozzle is. In most cases high NPSHA can be achieved only with low velocity in suction line.

Q2: Why we use concentric and why we use eccentric reduer?
Q2: Choice between concentric/eccentric reducer depends on suction system layout. You can use any of them. Please see information here:
- para. 4.1.1 in CEN/TR 13932:2009
- fig B.10 in API 686 2nd ed.
- ANSI/HI 9.8

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